Teensy 4.1 boot speed optimisations

clytle374 · Nov 22, 2024 · 0898043 · 0898043
1 parent 95664ba
commit 0898043
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diff --git a/platformio.ini b/platformio.ini
@@ -80,6 +80,7 @@ framework=arduino
 lib_deps = EEPROM, FlexCAN_T4, Time, SimplyAtomic
 test_build_src = yes
 test_ignore = test_table3d_native
+build_flags = -DTEENSY_INIT_USB_DELAY_AFTER=40
 
 ;STM32 Official core
 [env:black_F407VE]

diff --git a/speeduino/init.cpp b/speeduino/init.cpp
@@ -162,7 +162,10 @@ void initialiseAll(void)
     if(configPage13.onboard_log_file_style) { initSD(); }
   #endif
 
+//Teensy 4.1 does not require .begin() to be called. This introduces a 700ms delay on startup time whilst USB is enumerated if it is called
+#ifndef CORE_TEENSY41
     Serial.begin(115200);
+#endif
     pPrimarySerial = &Serial; //Default to standard Serial interface
     BIT_SET(currentStatus.status4, BIT_STATUS4_ALLOW_LEGACY_COMMS); //Flag legacy comms as being allowed on startup